CAGE TRAP DOOR-OPENING ASSEMBLY AND CAGE TRAP WITH THE SAME

Abstract

A pre-tensioned door opening assembly and a lock plate releasing mechanism for an animal cage trap having an entry door operative with an animal access opening and a locking mechanism that is engaged upon door closure to prevent the door from being opened by a trapped animal. The pre-tensioned door opening assembly includes a plurality of cable routing elements, and an automatic-return retracting mechanism having a cable. The housing of the automatic-return retracting mechanism is mounted outside the enclosure with the cable being routed through the cable routing elements and operatively coupled with the door. The lock plate releasing mechanism may be a timed-release mechanism which is mounted on the trap roof in functional cooperation with the locking mechanism. The timed-release mechanism disengages the locking mechanism to allow the pre-tensioned door opening assembly to open the entry door of the trap and release a trapped animal through the animal access opening once the operator is a safe distance away.

Claims

1. An animal trap comprising: an animal enclosure having a roof and a front end with an animal access opening into a vacant interior sized to receive an animal to be trapped; an entry door movably mounted at the access opening, the door operative in an opened position to reveal the animal access opening and in a closed position to block the animal access opening; a set mechanism for setting the trap; a trip pedal for releasing the set mechanism to allow the door to close; a pre-tensioned door opening assembly mounted on the trap and operatively engaged with the door; a locking mechanism engaged when the door is in the closed position to prevent the entry door from being opened by an animal from inside the trap, said locking mechanism also preventing said pre-tensioned door opening assembly from opening the door until said locking mechanism is disengaged; and a lock plate releasing mechanism configured to disengage the locking mechanism to allow said pre-tensioned door opening assembly to pull the door open after the user has reached a safe distance from the trap before the animal is released.

2. The animal trap of claim 1, wherein the lock plate releasing mechanism is a timed-release mechanism that disengages the locking mechanism after a time delay set by the user at the trap.

3. The animal trap of claim 2, wherein said locking mechanism includes a locking wire yoke mounted on a lower edge of the door and a lock plate mounted on the roof of the trap, the locking wire yoke having an upper bar that slides rearwardly adjacent the roof when the door is moved to the opened position, the lock plate engaging with said upper bar to block said rearward sliding when the door has moved to the closed position, said timed-release mechanism acting to lift the lock plate to a non-blocking position with respect to the upper bar of the locking wire yoke after the time delay, allowing the pre-tensioned door opening assembly to open the door.

4. The animal trap of claim 3, wherein said pre-tensioned door opening assembly includes a plurality of cable routing elements mounted on the animal trap and an automatic-return retracting mechanism mounted to the trap roof outside said animal enclosure and rearwardly of the animal access opening, said automatic-return retracting mechanism including a cable directed by the cable routing elements, a free end of said cable being coupled to said locking wire yoke upper bar.

5. The animal trap of claim 4, wherein said plurality of cable routing elements includes a plurality of pulleys.

6. The animal trap of claim 5, wherein said plurality of pulleys includes a door pulley mounted on a lower end of the door and first, second and third roof pulleys, said free end of said cable being run over the first roof pulley, then directed downwardly to pass over the door pulley, then directed upwardly and rearwardly to run over the second roof pulley, then forwardly to run under the third roof pulley, and then said free end being secured to the upper bar of the locking wire yoke.

7. The animal trap of claim 1, wherein the entry door is a single entry door and the trap has no other doors.

8. The animal trap of claim 1, wherein the lock plate releasing mechanism is remotely controlled by a user with a remote control unit.

9. A timed-release door-opening mechanism for an animal cage trap having a trap body defining an enclosure with a front end and a rear end, an entry door at said front end, a set mechanism for placing said trap in a set condition in which said entry door is open, a trip mechanism for releasing said set mechanism to allow said entry door to close with a trapped animal inside the enclosure, and a locking mechanism that is engaged when the entry door is closed to prevent the trapped animal from opening the trap, said timed-release door-opening mechanism comprising: a pre-tensioned door opening assembly configured to be mounted to the trap body outside the enclosure, said pre-tensioned door opening assembly including an automatic-return retracting mechanism with a cable that is routed through a plurality of cable routing elements mounted on the trap body and the entry door; and a mechanical or electrical timing device configured to disengage the locking mechanism to allow said pre-tensioned door opening assembly to pull the door open after a time delay that enables the user to reach a safe distance from the trap before the animal is released.

10. The timed-release door-opening mechanism for an animal trap of claim 9, wherein said automatic-return retracting mechanism and said mechanical timing device are removable for use on another trap.

11. The timed-release door-opening mechanism for an animal trap of claim 9, wherein said locking mechanism includes a locking wire yoke mounted on a lower edge of the door and a lock plate mounted on a roof of the trap, the locking wire yoke having an upper bar that slides rearwardly adjacent the roof when the door is moved to the opened position, the lock plate engaging with said upper bar to block said rearward sliding when the door has moved to the closed position, said timed-release mechanism acting to lift the lock plate to a non-blocking position with respect to the upper bar of the locking wire yoke after the time delay, allowing the automatic-return retracting mechanism to open the door.

12. The timed-release door-opening mechanism for an animal trap of claim 11, wherein said plurality of cable routing elements includes a plurality of pulleys.

13. The timed-release door-opening mechanism for an animal trap of claim 12, wherein said plurality of pulleys includes a door pulley mounted on a lower end of the door and first, second and third roof pulleys, said free end of said cable being run forwardly over the first roof pulley, then directed downwardly to pass over the door pulley, then directed upwardly and rearwardly to run over the second roof pulley, then forwardly to run under the third roof pulley, and then said free end being secured to the upper bar of the locking wire yoke.

14. An animal trap comprising: an animal enclosure having a roof and a front end with an animal access opening into a vacant interior sized to receive an animal to be trapped; a single entry door movably mounted at the access opening, the door operative in an opened position to reveal the animal access opening and in a closed position to block the animal access opening, said trap having no other doors through which an animal can enter or exit the trap other than the single entry door; a set mechanism for setting the trap; a trigger plate for releasing the set mechanism to allow the door to close; a pre-tensioned door opening assembly mounted on the trap and operatively engaged with the door, said pre-tensioned door opening assembly including an automatic-return retracting mechanism with a cable that is routed through a plurality of pulleys mounted on the trap body and the entry door; a locking mechanism engaged when the door is in the closed position to prevent the entry door from being opened by an animal from inside the trap, said locking mechanism also preventing said pre-tensioned door opening assembly from opening the door until said locking mechanism is disengaged, said locking mechanism including a locking wire yoke pivotally mounted on a lower edge of the door and a lock plate mounted on the roof of the trap, the locking wire yoke having an upper bar that slides rearwardly adjacent the roof when the door is moved to the opened position, the lock plate engaging with said upper bar to block said rearward sliding when the door has moved to the closed position; a lock plate releasing mechanism configured to disengage the lock plate to allow said pre-tensioned door opening assembly to pull the single entry door open by retracting the cable as routed over the plurality of pulleys.

15. The animal trap of claim 14, wherein the lock plate releasing mechanism is a timed-release mechanism that lifts the lock plate out of engagement with the upper bar of the wire yoke after a time delay set by the user at the trap.

16. The animal trap of claim 14, wherein the lock plate releasing mechanism is a remotely controlled mechanism that lifts the lock plate out of engagement with the upper bar of the wire yoke in response to a signal sent by the user using a remote control unit.

17. The timed-release door-opening mechanism for an animal trap of claim 14, wherein said plurality of pulleys includes a door pulley mounted on a lower end of the door and first, second and third roof pulleys, said free end of said cable being run forwardly over the first roof pulley, then directed downwardly to pass over the door pulley, then directed upwardly and rearwardly to run over the second roof pulley, then forwardly to run under the third roof pulley, and then said free end being secured to the upper bar of the locking wire yoke.

18. The timed-release door-opening mechanism for an animal trap of claim 14, wherein said automatic-return retracting mechanism is removable for use on another trap that is equipped with a plurality of pulleys.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG. 1 is a perspective view of an animal trap having a pre-tensioned door opening mechanism and a lock plate releasing mechanism embodied as a timed-release mechanism in accordance with a first embodiment of the present invention.

[0029] FIG. 2 is a partial cut-away side perspective view showing the front end of the animal trap shown in FIG. 1.

[0030] FIG. 3 is a top view of the pre-tensioned door opening mechanism and timed-release mechanism of the trap shown in FIG. 1.

[0031] FIG. 4 is a perspective view of a representative timing device for use within the timed-release mechanism in accordance with the present invention.

[0032] FIG. 5 is a bottom plan view of the upper housing of the timing device shown in FIG. 4.

[0033] FIG. 6 is bottom plan view of the lower housing of the timing device shown in FIG. 4.

[0034] FIG. 7 is a representative partial side view of the timing device shown in FIG. 4 as mounted on the trap (not to scale).

[0035] FIG. 8A is a perspective exploded view of a pulley like those shown in FIG. 1.

[0036] FIG. 8B is an assembled view of the two parts of the pulley shown in FIG. 8A.

[0037] FIG. 9 is an illustration showing a user activating the lock plate releasing mechanism from a safe distance using a remote control unit in accordance with a second embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0038] It is to be understood that the embodiments described herein are disclosed by way of illustration only. It is not intended that the invention be limited in its scope to the details of construction and arrangement of components set forth in the following description or illustrated in the drawings. Also, in describing the preferred embodiments, specific terminology will be resorted to for the sake of clarity. It is to be understood that each specific term includes all technical equivalents which operate in a similar manner to accomplish a similar purpose.

[0039] As shown in FIG. 1, the present invention is directed to a cage trap generally designated by reference numeral 10 and having a pre-tensioned door-opening assembly and lock plate releasing mechanism generally designated by reference numeral 12.

[0040] The trap 10 has a wire mesh animal enclosure made up of a base 14, a pair of opposed sidewalls 16 emanating from the base, a rear wall 18 secured to the sidewalls and the base, a roof 20 secured to the tops of the sidewalls and the rear wall, and an animal access opening equipped with an entry door 22. According to the preferred embodiment shown, the trap has a single entry door 22 and no other doors through which an animal may enter or exit the trap.

[0041] The entry door 22 is movably mounted at the front end of the trap and operates in an opened position to reveal the animal access opening and in a closed position to block the animal access opening. The door 22 is held in its open position by a hook or trigger 24 that is pivotally mounted on the roof 20 and that engages with the door when set, in a manner like that disclosed in the '624 patent. The door 22 is pivotally mounted along its upper edge 26 to the roof 20 of the trap. The rearward end of the trigger 24 is connected through linkage 23 to a trigger plate 25. As with the trap described in the '624 patent, an animal applying pressure to the trigger plate 25 “trips” the trap by disengaging the trigger 24 from the door aperture 21 (see FIG. 1), allowing the door to pivot to the closed position.

[0042] The trap 10 is provided with a locking mechanism generally designated by reference numeral 30 that prevents an animal trapped therein from opening the entry door from the inside. The locking mechanism 30 includes a wire yoke 32 and a lock plate 34. The wire yoke 32 has an upper bar 36 formed integrally with two arms 38 that extend at substantially right angles to the upper bar. The lower ends of the arms are pivotally captured within loops 39, or similar structures allowing rotational movement, on the lower end 40 of the door.

[0043] When the door is moved to the opened position, the upper bar 36 of the wire yoke 32 slides rearwardly, adjacent the roof 20 of the trap, to bring the wire yoke into a generally parallel relationship with the roof when the trap is set as in the '624 patent. The door 22 is kept in the opened position by engagement thereof with the trigger 24 as known from the '624 patent.

[0044] The yoke 32 is tensioned by a spring 44 to bias the door to the closed position. When the trap is tripped, the door 22 rotates downwardly to the closed position, blocking the animal access opening, with the upper bar 36 of the yoke 32 sliding forwardly to reach a forwardmost position when the door is closed as shown in FIG. 1. The lock plate 34 is mounted on the roof 20 of the cage trap 10 and, once the yoke upper bar has reached its forwardmost position, drops down to block the upper bar of the wire yoke from sliding rearwardly along the roof (best shown in FIG. 7) in response to pressure applied against the inside of the door by the trapped animal.

[0045] To release the animal, the lock plate 34 must be lifted out of engagement with the yoke 32 before the door 22 can be pulled upwardly. To accomplish this lifting action the trap includes a lock plate releasing mechanism generally designated by reference numeral 50, preferably embodied as a timed-release mechanism 51. The timed-release mechanism 51 is operative with a pre-tensioned door opening assembly generally designated by reference numeral 52 as shown in the enlarged partial views of FIGS. 2 and 3. The timed-release mechanism 51 lifts the lock plate 34 after a predetermined time delay, enabling the pre-tensioned door opening assembly 52 to open the entry door without any action by the user.

[0046] The timed-release mechanism 51 is preferably mechanical in design. Alternatively, the timed-release mechanism may be electrically or electronically controlled, or may be configured with a combination of mechanical, electrical and/or electronic components.

[0047] According to a first embodiment shown particularly in FIGS. 4-7, the lock plate releasing mechanism 50 embodied as the timed-release mechanism 51 includes an upper housing 54, a lower housing 56 with a cutout 58, and a magnet 60 which is mounted on a lower surface 55 of the upper housing. The upper and lower housings, which are generally disk-shaped and stacked with the upper housing on top of the lower housing with the magnet 60 therebetween, are rotatably movable relative to one another against the bias of a spring (not shown) such that, when the upper housing is wound relative to the lower housing and then released, the spring bias acts to unwind the upper housing to a point of equilibrium. At the point of equilibrium, the magnet 60 comes into alignment with the cutout 58 in the lower housing 56, exposing the magnet on the lower side of the timed-release mechanism. To cover the magnet 60 when the timed-release mechanism is not in use, the upper housing 54 is configured to allow advancement past the point of equilibrium to place the magnet 60 into an unaligned position with respect to the cutout 58 in the lower housing 56.

[0048] Prior to operation, the timed-release mechanism 51 is mounted on the roof 20 of the trap 10 above the lock plate 34 with the magnet 60 in the unaligned position relative to the cutout 58. The lock plate 34 is made of a magnetic material or is provided with a magnet 62 mounted on the upper surface of the lock plate 34 (see FIG. 7). With the magnet 60 of the mechanism 51 out of alignment with the cutout 58, the lock plate 34 is not acted upon by the magnet 60 and is operative to drop down and block rearward movement of the wire yoke once the door has been closed as shown in FIGS. 1 and 7.

[0049] To activate the timed-release mechanism 51, the user rotates the upper housing 54 counter-clockwise (or clockwise) relative to the lower housing 56 to store energy within the spring (not shown). Once the upper housing is released, the upper housing rotates clockwise (or counter-clockwise) under the spring bias, unwinding over a period of time that enables the user to reach a place of safety remote from the trap. When the upper and lower housings reach the point of equilibrium with the magnet 60 aligned with the cutout 58, the magnet 60 is exposed and magnetically attracts the lock plate 34, or the magnet 62 thereon, lifting the lock plate to release the wire yoke 32. Once the lock plate has been lifted, the pre-tensioned door opening assembly 52 is engaged as will now be described.

[0050] As shown in FIGS. 1-3, the pre-tensioned door opening assembly 52 includes a plurality of cable routing elements generally designated by reference numeral 70, and an automatic-return retracting mechanism generally designated by reference numeral 72. The cable routing elements may be embodied as a plurality of pulleys which are mounted to the trap. According to one preferred embodiment, the plurality of pulleys includes a roof edge pulley 74 mounted on the front roof edge bar 76 of the trap at the animal access opening, a first roof pulley 78 mounted rearwardly of and longitudinally spaced from the roof edge pulley 74, a second roof pulley 80 mounted on the roof rearwardly and in longitudinally spaced relationship with the first roof pulley 78, and a door pulley 82 mounted on the lower end 40 of the door 22. The roof edge pulley 74 is mounted in substantially vertical alignment with the door pulley 82.

[0051] The door pulley 82 is preferably formed, such as by injection molding, with a mounting base plate 81 (see FIG. 1) that is secured to the door using screws (not shown). Alternatively, the base plate 81 may be affixed to the door using rivets, adhesive or the like as would be understood by persons of ordinary skill in the art. The first and second roof pulleys 78, 80 and the roof edge pulley 74 are preferably molded to include a first piece 92 and a second piece 94 as shown in the exploded view of FIG. 8A. The first and second pieces 92, 94 are configured to be joined to one another with a snap fit that locks the pieces together as shown in FIG. 8B. Once joined, the two pieces 92, 94 define a channel 96 within which a selected roof bar of the trap 10 is captured when the pulley has been mounted to the roof. It is noted that as shown in FIGS. 1-3, the first and second roof pulleys 78, 80 are preferably the same size while the roof edge pulley 74 is larger. However, for the purposes of FIGS. 8A and 8B as being representative, the same construction applies to all three pulleys, regardless of differences in their individual sizes.

[0052] The automatic-return retracting mechanism 72 has a housing 84 with an inner spool (not shown) upon which a cable 86 is wound. The inner spool is tensioned by a torsion/clock spring (not shown), or the like, so as to retract the cable 86 back onto the spool after the cable has been pulled out. The extendible free end 88 of the cable is preferably provided with a fastener 90 (see FIG. 3) which may be embodied as a clip, such as a carbineer style clamp, or as simply a tied “fastener”, by which the extendible end of the cable may be secured to the upper bar 36 of the yoke 32 of the trap. The automatic-return retracting mechanism 72 of the pre-tensioned door opening assembly 52 may be embodied by a commercially available retractor such as the Automatic-Return Hanging Retractor, Item number 7433A16, sold by the MCMASTER-CARR® Supply Company. The MCMASTER-CARR® retractor may include an adjustable cable stop 71, but this cable stop 71 is not necessary to the operation of the present invention.

[0053] To use the automatic-return retracting mechanism 72 to open the trap door, the housing 84 is mounted to the roof 20 of the trap. The housing preferably includes an attachment element (not shown) for this purpose which may be embodied as a sliding clip element, a carbineer style clamp, or as any other suitable clamp or fastening mechanism as would be understood by persons of ordinary skill in the art.

[0054] With the housing 84 mounted on the trap roof 20, the cable 86 is pulled out against the tension of the return mechanism spring and routed through the pulleys with the free end 88 of the cable being secured to the wire yoke. More particularly, the cable is routed forwardly to and then downwardly over the roof edge pulley 74, downwardly to and over the door pulley 82, rearwardly and upwardly to and over the second roof pulley 80, forwardly and under the first roof pulley 78 and then secured at its free end 88 to the upper bar 36 of the locking yoke 32. In this configuration, the lock plate 34 blocks the yoke upper bar from being moved rearwardly and thereby prevents the door from being opened.

[0055] With the automatic-return retracting mechanism thus assembled to the trap with the cable routed through the pulleys as just described, the timed-release mechanism 51 is set for a desired time delay as deemed necessary for the user to withdraw to a safe distance from the trap, and the user moves to such distance. Upon expiration of the time delay, the timed-release mechanism acts to lift the lock plate. With the lock plate out of the way, rearward movement of the yoke is no longer blocked and the spool of the automatic-return retracting mechanism is free to spin and thereby retract the cable onto the spool by the stored energy therein. The retraction of the cable pulls the entry door to the opened position without intervention by the user, allowing the animal inside the trap to escape through the animal access opening while the user remains at a safe distance away from the trap.

[0056] According to a second embodiment, the lock plate releasing mechanism may include electronic components (not shown) that are controlled by a remote control unit 800 as shown in FIG. 9. The user 780 with the remote control unit 800 can activate the lock plate releasing mechanism from a safe distance in like manner to the operation described in the '783 patent. However, the mechanical design in accordance with the first embodiment is preferred. A remote-controlled mechanism could include an electrical component such as an electromagnet, a solenoid, or a motor the raise the locking mechanism when the user activates the remote control unit as would be understood by persons of ordinary skill in the art.

[0057] As described herein, the pre-tensioned automatic retracting mechanism is an independent accessory that can be easily attached to and then removed from any existing cage trap designed with a locking yoke of the type set forth in greater detail in the '624 patent. Because it is removable, a single automatic retracting mechanism may be used to sequently open a plurality of traps, reducing the manufacturing cost of each individual trap.

[0058] While disclosed in connection with a cage trap having a single entry door, the pre-tensioned door opening assembly 52 of the present invention may also be used on a cage trap having two opposed entry doors, such as the HAVAHART® Model 1045 two-door live animal cage trap. When used with a trap having two entry doors, at least one of the doors is provided with the plurality of cable routing elements 70, and the automatic-return retracting mechanism is mounted to operate with these routing elements 70 as activated by a timed-release mechanism in like manner as already described herein in connection with the single entry door trap. Whether the trap has one or two entry doors, however, the traps to which the present invention is directed do not include a secondary escape door that is separate from the entry door(s) and used only for animal release.

[0059] Accordingly, the present invention provides a door-opening mechanism that is easy to use and which, through the timed release opening capability, allows the user to maintain a safe distance from the trap when releasing a trapped animal.

[0060] It is to be understood that the present invention is not limited to the illustrated embodiments described herein. Modifications and variations of the above described embodiments of the present invention are possible as appreciated by those skilled in the art in light of the above teachings.